diff options
Diffstat (limited to 'src/backend/utils/adt/levenshtein.c')
| -rw-r--r-- | src/backend/utils/adt/levenshtein.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/backend/utils/adt/levenshtein.c b/src/backend/utils/adt/levenshtein.c index 3669adc18a0..f6e2ca6452a 100644 --- a/src/backend/utils/adt/levenshtein.c +++ b/src/backend/utils/adt/levenshtein.c @@ -95,6 +95,15 @@ varstr_levenshtein(const char *source, int slen, const char *target, int tlen, #define STOP_COLUMN m #endif + /* + * A common use for Levenshtein distance is to match attributes when building + * diagnostic, user-visible messages. Restrict the size of + * MAX_LEVENSHTEIN_STRLEN at compile time so that this is guaranteed to + * work. + */ + StaticAssertStmt(NAMEDATALEN <= MAX_LEVENSHTEIN_STRLEN, + "Levenshtein hinting mechanism restricts NAMEDATALEN"); + m = pg_mbstrlen_with_len(source, slen); n = pg_mbstrlen_with_len(target, tlen); |